Solid-State Battery Packaging With H2S Color-Change Detection
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Solution Overview
Problem
Solid-state batteries containing sulfide-based solid-state electrolytes face challenges in detecting hydrogen sulfide generation due to its colorless and irritating nature, which can indicate battery abnormalities, and existing solutions fail to address the underlying issue effectively.
Innovation Solution
A packaging material for solid-state batteries is designed with layers containing a color developer that reacts with hydrogen sulfide, allowing for visual detection of abnormalities by color change, and may include a hydrogen sulfide adsorbent to detoxify the gas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If a color developer is added to the packaging material layers, then visual detection of hydrogen sulfide generation is enabled, but the device complexity increases
Solution Approach 1:
The patent applies color change principle by incorporating a color developer into the packaging material layers that reacts with hydrogen sulfide to produce a visible color change. This allows direct visual detection of hydrogen sulfide generation without requiring external detection devices, thereby improving detectability while the integration into existing layers minimizes the increase in device complexity
Solution Approach 2:
The color developer acts as an intermediary substance that mediates between the invisible hydrogen sulfide gas and human visual detection. The color developer reacts with hydrogen sulfide to produce a colored compound that can be easily observed, thus enabling detection without requiring complex instrumentation
2Loss of time
If the color-developer-containing layer is disposed on the inner side relative to the barrier layer, then early detection of internal hydrogen sulfide is achieved, but the color change may be difficult to observe if the barrier layer is opaque
Solution Approach 1:
The patent applies local quality principle by creating a localized observation window or transparent region in the packaging structure where the color-developer-containing layer is visible. This allows the color change to be observed at specific locations without requiring the entire barrier layer to be transparent, thus enabling early detection while maintaining overall barrier integrity and providing visible feedback
3Difficulty of detecting and measuring
If the color-developer-containing layer is disposed on the outer side relative to the barrier layer, then color change becomes significant near defective portions facilitating identification, but hydrogen sulfide must pass through the barrier layer to be detected
Solution Approach 1:
The patent applies feedback principle by positioning the color-developer-containing layer on the outer side of the barrier layer so that color change provides visual feedback about the condition and location of barrier defects. When hydrogen sulfide penetrates through defective portions of the barrier layer, it triggers color change at the corresponding location, providing immediate feedback about defect presence and position without compromising the primary barrier function
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables early-stage visual detection of battery abnormalities and effective detoxification of hydrogen sulfide, facilitating timely replacement and preventing leakage.
Implementation Method 1
at least one of the layers constituting the packaging material contains a color developer that reacts with hydrogen sulfide and thereby changes color
Implementation Method 2
may include a hydrogen sulfide adsorbent to detoxify the gas
Data Source
AI summary
A packaging material for solid-state batteries according to one aspect of the present disclosure contains sulfide-based solid electrolytes, including at least a substrate layer, a barrier layer, and a sealant layer in this order, in which at least one of the layers constituting the packaging material contains a color developer that changes color when reacting with hydrogen sulfide.